rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (10499 ticks this GP) idle=30e/1/0x4000000000000004 softirq=295323/295323 fqs=4972 rcu: (t=10500 jiffies g=390505 q=92573) NMI backtrace for cpu 0 CPU: 0 PID: 3601 Comm: udevd Not tainted 4.19.73 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x189/0x1d5 kernel/rcu/tree.c:1340 print_cpu_stall kernel/rcu/tree.c:1478 [inline] check_cpu_stall kernel/rcu/tree.c:1550 [inline] __rcu_pending kernel/rcu/tree.c:3293 [inline] rcu_pending kernel/rcu/tree.c:3336 [inline] rcu_check_callbacks.cold+0x5e3/0xd90 kernel/rcu/tree.c:2682 update_process_times+0x32/0x80 kernel/time/timer.c:1636 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:164 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1274 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0x33b/0xdc0 kernel/time/hrtimer.c:1460 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1518 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline] smp_apic_timer_interrupt+0x111/0x550 arch/x86/kernel/apic/apic.c:1092 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:hhf_dequeue+0x9f/0xa00 net/sched/sch_hhf.c:433 Code: e8 f6 a9 dc fb 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 0f 85 52 07 00 00 49 8b 1e 48 8d 7b 10 48 89 f8 48 c1 e8 03 42 0f b6 04 20 <84> c0 74 08 3c 03 0f 8e 4e 07 00 00 44 8b 7b 10 31 ff 44 89 fe e8 RSP: 0018:ffff8880ae8074d8 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffff88803930f4f8 RCX: ffffffff858ebe8e RDX: 0000000000000100 RSI: ffffffff858eb8aa RDI: ffff88803930f508 RBP: ffff8880ae807528 R08: ffff88809717c180 R09: 0000000000000006 R10: ffff88809717caf0 R11: 0000000078a957cc R12: dffffc0000000000 R13: ffff88803930f240 R14: ffff88803930f590 R15: ffff88803930f590 dequeue_skb net/sched/sch_generic.c:277 [inline] qdisc_restart net/sched/sch_generic.c:380 [inline] __qdisc_run+0x1e7/0x1960 net/sched/sch_generic.c:398 __dev_xmit_skb net/core/dev.c:3501 [inline] __dev_queue_xmit+0x165c/0x2fe0 net/core/dev.c:3811 dev_queue_xmit+0x18/0x20 net/core/dev.c:3876 neigh_resolve_output net/core/neighbour.c:1369 [inline] neigh_resolve_output+0x5b7/0x980 net/core/neighbour.c:1349 neigh_output include/net/neighbour.h:501 [inline] ip6_finish_output2+0xb7f/0x2550 net/ipv6/ip6_output.c:120 ip6_finish_output+0x574/0xbe0 net/ipv6/ip6_output.c:154 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip6_output+0x235/0x7c0 net/ipv6/ip6_output.c:171 dst_output include/net/dst.h:447 [inline] NF_HOOK include/linux/netfilter.h:289 [inline] ndisc_send_skb+0xf3b/0x1460 net/ipv6/ndisc.c:491 ndisc_send_rs+0x134/0x6d0 net/ipv6/ndisc.c:685 addrconf_rs_timer+0x30f/0x680 net/ipv6/addrconf.c:3821 call_timer_fn+0x18d/0x720 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers kernel/time/timer.c:1682 [inline] __run_timers kernel/time/timer.c:1650 [inline] run_timer_softirq+0x652/0x1700 kernel/time/timer.c:1695 __do_softirq+0x25c/0x921 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1094 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:lock_is_held_type+0x17e/0x210 kernel/locking/lockdep.c:3940 Code: 00 00 00 fc ff df 41 c7 85 7c 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 75 63 48 83 3d 21 76 20 07 00 74 30 48 89 df 57 9d <0f> 1f 44 00 00 48 83 c4 08 44 89 e0 5b 41 5c 41 5d 5d c3 48 83 c4 RSP: 0018:ffff888097187ae0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff10e48c1 RBX: 0000000000000282 RCX: ffff88809717ca00 RDX: dffffc0000000000 RSI: ffff888097d8ed20 RDI: 0000000000000282 RBP: ffff888097187b00 R08: ffff88809717c180 R09: ffffed1013422850 R10: ffffed101342284f R11: ffff88809a11427f R12: 0000000000000001 R13: ffff88809717c180 R14: ffff888097187dc0 R15: 0000000000000000 lock_is_held include/linux/lockdep.h:344 [inline] ep_wakeup_source fs/eventpoll.c:630 [inline] ep_pm_stay_awake fs/eventpoll.c:636 [inline] ep_send_events_proc+0x97b/0xc10 fs/eventpoll.c:1697 ep_scan_ready_list+0x305/0xb20 fs/eventpoll.c:708 ep_send_events fs/eventpoll.c:1713 [inline] ep_poll+0x3b4/0xd10 fs/eventpoll.c:1840 do_epoll_wait+0x1b3/0x200 fs/eventpoll.c:2198 __do_sys_epoll_wait fs/eventpoll.c:2208 [inline] __se_sys_epoll_wait fs/eventpoll.c:2205 [inline] __x64_sys_epoll_wait+0x97/0xf0 fs/eventpoll.c:2205 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fcaae302943 Code: 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 90 90 90 90 90 90 83 3d b5 dc 2a 00 00 75 13 49 89 ca b8 e8 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 3b c4 00 00 48 89 04 24 RSP: 002b:00007ffcca909b98 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8 RAX: ffffffffffffffda RBX: 0000000000000bb8 RCX: 00007fcaae302943 RDX: 0000000000000008 RSI: 00007ffcca909c90 RDI: 000000000000000a RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000bb8 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000000000 R14: 00000000011f1790 R15: 00000000011dc030 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28118 comm=syz-executor.5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28124 comm=syz-executor.4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28245 comm=syz-executor.5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28250 comm=syz-executor.4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28281 comm=syz-executor.5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28330 comm=syz-executor.5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28342 comm=syz-executor.4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28359 comm=syz-executor.5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28371 comm=syz-executor.4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28391 comm=syz-executor.5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28406 comm=syz-executor.4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28452 comm=syz-executor.5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28460 comm=syz-executor.4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28486 comm=syz-executor.5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28514 comm=syz-executor.5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28515 comm=syz-executor.4